BS 2782-4:Method 470C:1991
Current
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Methods of testing plastics. Chemical properties Determination of ash of unplasticized cellulose acetate
Hardcopy , PDF
English
30-04-1991
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Procedures at two different calcination temperatures.
| Committee |
PRI/21
|
| DevelopmentNote |
Also numbered as ISO 3451-3 Supersedes 80/52357 DC (06/2005)
|
| DocumentType |
Standard
|
| Pages |
8
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
1.1 This part of ISO 3451 specifies a method for determining the ash, consisting of inorganic residue, yielded by unplasticized cellulose acetate.
1.2 This method applies to unplasticized cellulose acetate free of additives, fillers, dyes or other materials which may affect the result.
1.3 When plasticizers, additives, fillers or dyes which may affect the result are present, they shall be separated by a method agreed between the interested parties.
1.4 The ash content at 575 ± 25 °C is a reasonable measure of the mineral salts and inorganic foreign matter in the cellulose acetate. The weight of ash obtained varies with the temperature of ignition. Higher temperatures such as 850 °C will convert calcium carbonate and other carbonates to the oxides and thus give lower values for the ash. The composition of ash may vary with the pulping process used in manufacture, which limits the significance of the ash determination in absolute terms.
| BS 2880:1991 | Methods of testing cellulose acetate flake |
| BS 2782-0:1982 | Methods of testing plastics Introduction |
| BS 2782-4 Method 470A:1991 | Methods of testing plastics. Chemical properties Determination of ash (general methods) |
| ISO 585:1990 | Plastics Unplasticized cellulose acetate Determination of moisture content |
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